Improved automatic wagon-brake



F. M. PICKERILL.

Wagon Brake.

Patnted; May 3, 1870.

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Letters Patent No. 102,589, dated May 3, 187i).

IMPROVED AUTOMATIC WAGON-BRAKE.

The Schedule referred to in these Letters Patent and making part 'of thesame To all whom it may concern:

Be it known that I, FRANK M.P10KEB1LL, of In-.\

dianapolis, in the county of Marion and State of Indiana, have inventedan Improved Automatic Wagon- Brake; and I do hereby declare that thefollowing is a full and exact description thereof, which will enablethose skilled in the art to make and use the same, reference being badto the accompanying drawings and letters marked thereon mahinga part ofthis specification, in which- I Figure 1 is a perspective representationof a wagon with my improved automatic brake attached.

Figure 2 is a view of the under side of the reach and sliding bar,showing how the bar is held in place to operate the brake-rod.

Figure 3, an elevation of the brake-rod detached from the other parts.

The present invention relates to an improved automatic wagon-brake, bymeans of which the gravity of the load checks the rotation of thewheels, and its nature will be fully understood by the followingdesoription.

E represents the forward, and

E, the hind axle-tree of an ordinary wagon; and

D is the front, and y (l, the rear bolster.

H are the hounds.

P, the reach.

A, the box, and

B, the wheels.

S represents an ordinary cross-bar, securely fastened to the hounds H,and slotted out at I, fig. 1, so that the crank-rod M may operatefreely. This rod has hearings on the cross-bar S at O O, and it isprovided with cranks Q, which support brakeshoes It, and with aloop-crank, V, which is operatedby means of a sliding bar J, fig. 2,which is arranged as follows: 7 I v This bar is made of metal or othersuitable material, and it is held so as to slide longitudinallyv on theunder side of the reach Pby means of loops K, fig. 2, and one. of itsends is jointed to the loop-crank V of the rod M, and the other end isprovided with a hole,

through which the king-bolt.Gis put-to hold it in place. Thisarrangement is such, that when the forward end of the reach I? isslotted, as shown'at L, fig. v2, and the box A rests uponfriction-rollers F, pivotedto the front bolster D, fig. 1, the saidreach will so move, by means of the slot, as to shorten the distancebetween the wheels B. This movement will cause the sliding bar J to turnthe loop-crank V, and con-i" 'sequently bring the brake-shoes It againstthe hind wheels by means of the cranks Q Q.

In practice, the rod M may run straight across the bar S, ifaJOop-crauk, V, is attached toit, so that the barJ will turn it in itsbearings O. 1

In any case, however, the cross-barS must be slotted, so as to allow theloop I to .pass through it and around the reach P.

I have thus described the complete brake as I now construct it; but I donot, however, claim the looped crank-bar V, as that is used in thepatent of S,.Warren, No. 66,917. Neitherdo I claim the slotted reach, asthat is a common device well known tothe art; but I rely on the factthat the loop-crank V is materially strengthened by means of the slottedbar S, as a crank-rod thus supported may be made of -much' lighter ironthan when no bar is used, and on the iinprovemeut consisting of placingthe connecting-rod under the reach, and supporting'it by loops,'so thatit need not be made of so heavy iron as would otherwise be necessary,while at the same time-it is out of the way of dumping loads, and noextra frame-work is necessary. g

Having thus described my invention,

What I claim, and desire to secure by Letters Patent of the UnitedStates, is- I In the construction of wagon-brakes, the slot-ted bar S,arranged to support the loop-crank bar V, when used in combination withthe sliding bar J, operating in lo'ops attached to the under side of thereach, and

with brakeshoes It, as described.

FRANK M. PIcKEnILL.

Witnesses:

G. L. OHAPIN, E. E. GIBsoN'.

